Why Aircraft Carriers Have an Angled Runway

In 1919, Admiral William Benson tried to eliminate the Navy's Aviation Division, claiming he could not "conceive of any use the fleet will ever have for aviation." By the end of the war, engagements like the Battle of the East China Sea were showing American naval air superiority.

Such success bled into the 50s, with jets becoming increasingly common aircraft carriers. But as carriers became more widely and commonly used, problems arose. What was the best way to get jets on and off the carriers quickly and efficiently arrange things to maximize both carrying capacity and runway space.

This U.S. Navy training film from 1955 shows the solution that the Navy came up with, which is still in use today: angular runways.

The angled design, invented by Rear Admiral Dennis Cambell of the British Royal Navy, and presented to the America in 1951, offered a few distinct advantages over other options. In the case of an aborted landing, and angled runway gave returning planes plenty of room and open air to speed up and take off again. Better yet, this angled design kept carriers from having to sacrifice any on-deck parking space for planes not currently in flight.

It's a simple bit of geometry, but with big implications, ones that carry forward to the modern day.

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